When UICollectionViewFlowLayoutAlertForInvalidItemSize Occured Some Log Like These Occurred, and then app crash *** Assertion failure in void _UIGraphicsBeginImageContextWithOptions(CGSize, BOOL, CGFloat, BOOL)(), UIGraphics.m:410 crash Output *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'UIGraphicsBeginImageContext() failed to allocate CGBitampContext: size={0, 16}, scale=3.000000, bitmapInfo=0x2002. Use UIGraphicsImageRenderer to avoid this assert.'

There Many Crash Report Like this, But no any code about my business can tell me why, so I think this is a system bug, Who can tell me why and how to avoid it? Thread 19 Crashed: 0 CoreFoundation __exceptionPreprocess +224 1 libobjc.A.dylib objc_exception_throw +56 2 CoreFoundation -[__NSSingleObjectEnumerator initWithObject:collection:] +0 3 CFNetwork _CFHTTPServerResponseEnqueue +24424 4 CFNetwork _CFHTTPServerResponseEnqueue +22476 5 CFNetwork _CFHTTPServerResponseEnqueue +31004 6 CFNetwork _CFHTTPMessageSetResponseProxyURL +8652 7 CFNetwork 0x00000001a09a6138 0x1a09a1000 + 20792 8 CFNetwork CFURLDownloadCancel +35396 9 CFNetwork CFURLDownloadCancel +29408 10 CFNetwork 0x00000001a09aa444 0x1a09a1000 + 37956 11 CFNetwork 0x00000001a09a7cf0 0x1a09a1000 + 27888 12 CFNetwork CFURLDownloadCancel +41784 13 libdispatch.dylib _dispatch_block_async_invoke2 +104 14 libdispatch.dylib _dispatch_client_callout +16 15 libdispatch.dylib _dispatch_lane_serial_drain$VARIANT$mp +608 16 libdispatch.dylib _dispatch_lane_invoke$VARIANT$mp +464 17 libdispatch.dylib _dispatch_workloop_worker_thread +588 18 libsystem_pthread.dylib _pthread_wqthread +272 19 libsystem_pthread.dylib start_wqthread +8 I have sent the crash file here, that i removed some information about my app crash.crash

AnyOne Can tell me what's different about MXMemoryMetric and phys_footprint? Which is the really one dicide the app should be killed by OOM?

In my Singleton Class，I used [UIImage imageNamed:] in the block of dispatch_once，it sometimes crash，I have thought many days，my image is stored in my App（Not in Assets，In My custom Resource File），it's unbelievable，who can tell me why? This is my Code     static dispatch_once_t onceToken;     static AClass *manager = nil;     dispatch_once(&onceToken, ^{         manager = [[AClass alloc] init];         dispatch_async(dispatch_get_global_queue(0, 0), ^{             NSMutableArray * imgDataList = [NSMutableArray array];             for (int i=0; i<=15; i++) {                 NSString *imageName=[NSString stringWithFormat:@"imageNamedxx_%d@2x.png",i];                 UIImage * img = [UIImage imageNamed:imageName]; if (img) { [imgDataList addObject:img]; }                             }             dispatch_async(dispatch_get_main_queue(), ^{                 manager.liveImgData = [imgDataList copy];             });         });     });     return manager; } 1 libobjc.A.dylib  objc_exception_throw  2 CoreFoundation  -[CFPrefsSearchListSource addManagedSourceForIdentifier:user:]  3 Foundation  -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:]  4 UIKitCore  -[_UIImageCGImageContent initWithCGImage:scale:]  5 UIKitCore  -[CUINamedImage(UIKitAdditions) UIImageWithAsset:configuration:flippedHorizontally:optionalVectorImage:]  6 UIKitCore  -[UIImageAsset imageWithConfiguration:]  7 UIKitCore  -[_UIPathLazyImageAsset imageWithConfiguration:]  8 UIKitCore  +[UIImage imageNamed:inBundle:withConfiguration:] myApp AClass - 第 42 行（[UIImage imageNamed:]） __34+[AClass shareInstance]_block_invoke_2 + 42

I output the package size report according to the document, and found that the package size increase appears on systems that do not support WidgetKit, such as iOS11. I think this is wrong. WidgetKit is only used in iOS14. Why should the package size of low-level systems become larger? 1、Report With WidgetKit Of low-level systems Supported variant descriptors: [device: iPhone10,2, os-version: 11.0], [device: iPhone10,3, os-version: 11.0], [device: iPhone10,5, os-version: 11.0], [device: iPhone9,4, os-version: 10.0], [device: iPhone9,2, os-version: 10.0], and [device: iPhone10,6, os-version: 11.0] App + On Demand Resources size: 76.4 MB compressed, 162.4 MB uncompressed App size: 76.4 MB compressed, 162.4 MB uncompressed On Demand Resources size: Zero KB compressed, Zero KB uncompressed 2、 Report Without WidgetKit Of low-level systems Supported variant descriptors: [device: iPhone10,3, os-version: 11.0], [device: iPhone9,2, os-version: 10.0], [device: iPhone10,2, os-version: 11.0], [device: iPhone10,5, os-version: 11.0], [device: iPhone10,6, os-version: 11.0], and [device: iPhone9,4, os-version: 10.0] App + On Demand Resources size: 75.8 MB compressed, 160.6 MB uncompressed App size: 75.8 MB compressed, 160.6 MB uncompressed On Demand Resources size: Zero KB compressed, Zero KB uncompressed Version 12.0 beta 6 (12A8189n)

When I develop My WidgetKit Extension，I set some breakpoints for my code In the App Target And Extension Target ，It don't work，Who can help me solve this problem? Thank you!